Maybe group sms application for your desktop with BlackBerry phone such as Quicker SMS is useful to you.Now Quicker SMS is improved and supports Bluetooth now.

Quicker SMS (for both Bluetooth connection and USB cable connection) is a software which allows you to send SMS on your PC. You can type SMS on your keyboard quicker than do it on your BlackBerry phone. Especially, it is very useful when you want to send group SMS to your friends. It is an effective tool to improve your efficiency and save your time.
At the same time, Quicker SMS can receive new SMS from your BlackBerry phone whenever the phone is connected with it. You can save SMS from your friends on the disk permanently and forward to others easily. It supports importing all contacts in your BlackBerry phone. So you can select contacts quickly when you want to send SMS.

Now, Quicker SMS (Bluetooth) is ready and now you can use Bluetooth to connect Quicker SMS with your PC. It includes two parts:
One is running on your PC(PC side program), another is running on your phone(BlackBerry side program).
1. PC side program;
2. BlackBerry side program;

Quicker SMS (Bluetooth) version is for bulk sms / group sms from your desktop through your BlackBerry phone. It will free your hand from phone's small keyboard and speed up sending out sms to your many many friends with one click. Just visit Quicker SMS for BlackBerryfor more information.